1,720,967 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Compositional Diversity and Space Weathering of Near-Earth Objects
No full textAsteroids, as remnants of the early solar system, hold crucial clues about the processes that led to the formation of planets. These small bodies are composed of materials that have remained relatively unchanged since the solar system's formation, making them valuable targets for scientific study. Near-Earth objects (NEOs), which include both asteroid-like and comet-like bodies whose orbits bring them close to Earth, are particularly important. These objects not onlyoffer insights into planetary formation but also pose potential threats to Earth due to their proximity and frequent interactions with terrestrial planets. Understanding their composition, distribution, and behavior is essential for both scientific research and planetary defense. Data Collection Fig. 1: Orbital distribution of Near-Earth Objects by type, showing semimajor axis vs. eccentricity (left) and perihelion vs. inclination (right). Objective and Methodology We gather visible colors of NEOs from several astronomical surveys, including the Sloan Digital Sky Survey (SDSS) (Sergeyev & Carry, 2021), SkyMapper (Sergeyev et al., 2022), Gaia mission (Galluccio et al., 2022), and ground-based observations (Mahlke et al., 2022). These datasets are merged into a single catalog, creating a comprehensive resource for analyzing the compositional properties of NEOs. The orbital distribution of NEOs in our study is shown in Fig. 1. Each data source offers unique contributions: - SDSS: Provides multi-filter observations in u, g, r, i, z bands, allowing for detailed photometric analysis.- SkyMapper: Offers a combination of shallow and deep sequences in multiple filters, enhancing the dataset's depth and breadth.- Gaia: Contains low-resolution reflectance spectra covering a wide wavelength range, providing crucial spectral data.- Ground-based Observations: High-resolution spectra from various surveys add to the robustness of the dataset. Data ProcessingData from these diverse sources were cross-matched and compared to ensure consistency. Systematic biases were identified and corrected to create a homogeneous dataset. Given the fast-moving nature of NEOs, the study re-measured photometry for these objects in the SDSS to address potential biases related to their rapid motion. This step was crucial for ensuring accurate photometric measurements, which are foundational for subsequent analysis. Taxonomy and Classification The taxonomy of NEOs was determined using photometric colors, which were converted from reflectance spectra. The classification followed a probabilistic approach, assigning each NEO to one of ten taxonomic classes (A, B, C, D, K, L, Q, S, V, X) based on the highest probability. This methodology allows for a comprehensive classification scheme that accommodates the inherent uncertainties in photometric data see Fig. 2.- Multi-color Classification: Utilized combinations of g, r, i, z colors to classify NEOs with high accuracy.- Single-color Classification: Applied when only g-r color was available, providing a broader classification into "red" or "blue" objects. This approach, while less precise, ensures that all available data can be utilized. Fig. 2: Taxonomic classification of NEOs in the SDSS color space. Results The study produced several key findings:- Photometric and Taxonomic Data: The catalog includes updated photometry for 470 NEOs and taxonomic classifications for 7,401 NEOs (Sergeyev et al., 2023) see Table 1. This extensive dataset forms a solid foundation for further analysis.- Spectral Slope and Perihelion Dependence: Confirmed the relationship between spectral slope and perihelion among S-type NEOs, suggesting a rejuvenation mechanism linked to thermal fatigue. This finding supports existing theories about the effects of solar radiation on asteroid surfaces (Graves et al., 2019). Analysis of Space Weathering Space weathering, which alters the surface properties of asteroids through exposure to solar wind and micrometeorite impacts, was analyzed using spectral slope and taxonomic distribution. This analysis provides insights into the aging processes of asteroid surfaces.- S-type Asteroids: Showed a constant spectral slope for smaller diameters and an increase for larger ones, consistent with previous studies. This trend indicates that space weathering affects asteroids differently based on their size. - Q/S Ratio: Indicated a higher fraction of Q types (fresh surfaces) among smaller NEOs, suggesting a size-dependent space weathering process see Fig 3. This ratio is an important indicator of the relative age of asteroid surfaces. Fig. 3: Running mean of the ratio between the number of Q and S asteroids as a function of perihelion, inclination, and diameter. Shaded areas correspond to the uncertainties considering the Poisson statistic for the Q/S ratio. Distribution of A-type AsteroidsA-types, characterized by olivine-rich compositions, are rare in the main belt but more common among NEOs. The study found a higher fraction of A-types near the orbit of Mars, possibly linked to the Hungaria asteroid family (Devogèle et al., 2019). This distribution pattern provides clues about the dynamical processes that bring these objects into near-Earth space. Source Regions of NEOs The study predicted the taxonomic distribution of small asteroids in various source regions, such as the ν6 secular resonance, 3:1 and 2:1 mean-motion resonances with Jupiter, Phocaea, and Hungaria regions, and Jupiter Family Comets (JFC). The results align with existing models, showing the dominance of mafic-silicate-rich asteroids in inner regions and opaque-rich asteroids in outer regions. This distribution reflects the compositional gradients in the asteroid belt and the dynamical processes that transport these object
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
Author Under Sail The Imagination of Jack London, 1893-1902
No full textIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Intro -- Title Page -- Copyright Page -- Dedication -- Contents -- Acknowledgments -- Introduction -- 1. Spirit Truth -- 2. From Absorption to Theatricality and Back Again -- 3. "I Will Build a New Present" -- 4. Sons as Authors -- 5. Fathers as Publishers -- 6. The Daughter as Author -- 7. Lovers as Authors -- 8. At Sea with the Family -- 9. Yellow News, Yellow Stories -- 10. The Return Home -- Notes -- Bibliography -- Index -- About Jay WilliamsIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Description based on publisher supplied metadata and other sources.Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, YYYY. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries
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